213994678 has 8 divisors (see below), whose sum is σ = 321173568. Its totient is φ = 106936824.

The previous prime is 213994673. The next prime is 213994699. The reversal of 213994678 is 876499312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213994673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25701 + ... + 32992.

It is an arithmetic number, because the mean of its divisors is an integer number (40146696).

Almost surely, 2^213994678 is an apocalyptic number.

213994678 is a deficient number, since it is larger than the sum of its proper divisors (107178890).

213994678 is a wasteful number, since it uses less digits than its factorization.

213994678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60518.

The product of its digits is 653184, while the sum is 49.

The square root of 213994678 is about 14628.5569349817. The cubic root of 213994678 is about 598.1374444982.

The spelling of 213994678 in words is "two hundred thirteen million, nine hundred ninety-four thousand, six hundred seventy-eight".